解析:第1个小标题Electromagnetic Suspension(EMS)部分的第l段第3句:Electromagnets are similar to other magnets in that they attract metal objects,but the magnetic pull is temporary.题目和原文均为对electromagnets和other magnets的比较,题目中的not permanent与文中的temporary意思一致,故答案为Y。反馈...
Originating from Earth’s core and atoms themselves, magnetism is the invisible force that shapes our everyday lives. Here’s how magnets actually work.
Ferrite Magnets possess strong magnetic fields just like other electromagnets, however, they do not require an electrical force to produce an attraction. They can do that on their own. Since ferrite magnets are not as strong as neodymium magnets, we advise that you do not cut them or alter t...
There are numerous types of magnets – they include natural magnetic materials, such as alnico which is an iron alloy, and electromagnets which are created by coiled wire and a current going through it. Unlike alloys like alnico, the magnetism of electromagnets ceases as soon as the electricity...
Temporary magnets are distinguished from permanent magnets by their ability to turn and off. Electromagnts, for instance, rely on an electrical current to generate a magnetic field. Electromagnets have a north and south pole just like their permanent counterparts. The position of an electromagnet’s...
Electromagnets are not exactly the same as other magnets because the magnetic pull of electromagnets is not permanent.如何将EXCEL生成题库手机刷题 手机使用 分享 反馈 收藏 举报 参考答案: Y 复制 纠错举一反三 麦粒灸治疗肾虚慢性泄泻配穴选取以下哪几个穴位:() A. 关元 B. 命门 C. 肾俞 D....
Three general types of magnets exist: permanent magnets, temporary magnets and electromagnets. Permanent magnets retain their magnetic quality over long periods of time. Temporary magnets lose their magnetism quickly. Electromagnets use electric current to generate a magnetic field. ...
Electromagnets are not exactly the same as other magnets because the magnetic pull of electromagnets is not permanent.A.YB.NC.NG
The particles injected into an accelerator are referred to as a “beam.” A series of electromagnets steers and focuses the beam of particles. In a linear accelerator or LINAC (pronounced line-ack or lin-ack), the particles shoot straight toward a fixed target. In a circular accelerator, the...
Electromagnets are used for a wide range of purposes, including lifting scrap metal. PETER AN—GETTY IMAGES Magnets Are Everywhere Magnets are found in many commonly used devices. They are in any machine that has a motor. That includes fans, washing machines, and cars. Motors use magnets and...